Tool Material for Machining High-temperature Alloys
The high-temperature alloy is a metal material with a high melting point and good thermal and chemical stability. In production, it is generally processed by cutting. This type of deployment is not an easy task for common metal materials, and in machining high-temperature alloys, the cutting tool material is particularly important.
High temperature alloys include nickel-base alloys, cobalt-based alloys and iron-base alloys. These alloys have excellent mechanical properties at high temperatures, so they are widely used in high temperature parts and components in aerospace, petrochemical and nuclear industries. In order to ensure the machining accuracy and extend the life of the tool, the cutting tool material should have good hardenability, high temperature resistance and oxidation resistance, as well as good toughness and wear resistance.
In general, tungsten carbide is the most common tool material for machining high-temperature alloys. Tungsten carbide cutting tool has high hardness and wear resistance and can keep sharp cutting edge at high temperature. It also has good oxidation resistance, thermal shock resistance and plasticity. The high temperature resistance can reach up to 800 degrees Celsius, which is suitable for machining high-temperature alloys.
Another good tool material for machining high-temperature alloys is high-speed steel. High-speed steel has good heat resistance and oxidation resistance. It is stronger at high temperatures than other metal materials and can maintain the solidity of the tools cutting edge at high temperatures up to 650 degrees Celsius.
In addition, cubic boron nitride (CBN) is one of the ideal materials for machining parts with high temperature, wear resistance, corrosion resistance and high-strength requirements. Compared with traditional hard materials such as tungsten carbide and high-speed steel, the wear resistance and oxidation resistance of the cutting edge of CBN tool is higher and its heat conductivity is better. The temperature resistance of CBN tool can reach up to 1100 degrees Celsius, which is higher than tungsten carbide and high-speed steel.
In conclusion, machining high-temperature alloys requires the use of appropriate cutting tool materials, such as tungsten carbide, high-speed steel and cubic boron nitride. Tungsten carbide and high-speed steel have good heat resistance and oxidation resistance and can maintain the integrity of the cutting edge at high temperatures. And cubic boron nitride has better temperature resistance, wear resistance and oxidation resistance. Choosing the right cutting tool material for machining high-temperature alloys will reduce tool wear and improve machining accuracy.
